x86: tangier: acpi: Replace _ADR() by _UID() in description of PCI host bridge

PCI Firmware specification requires _UID() and doesn't require _ADR()
to be set. Replace latter by former.

Reported-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl
index 9d81abb..11b06e5 100644
--- a/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl
+++ b/arch/x86/include/asm/arch-tangier/acpi/southcluster.asl
@@ -10,7 +10,7 @@
     Name (_HID, EISAID("PNP0A08"))    /* PCIe */
     Name (_CID, EISAID("PNP0A03"))    /* PCI */
 
-    Name (_ADR, Zero)
+    Name (_UID, Zero)
     Name (_BBN, Zero)
 
     Name (MCRS, ResourceTemplate()